Concrete floor construction.



W. E. RAMSEY.

CONCRETE FLOOR CONSTRUCTION.

APPLICATION FILED AUG-25. I913- Patented May 9,1916.

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WILLIAM E. RAMSEY, OF CHICAGO. ILLINOIS.

CONCRETE FLOOR CONSTRUCTION.

Application filed August 25, 1913.

2' '0 all whom it may concern Be it known that I, WILLIAM E. RAMSEY, a citizen of the United States, and residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Concrete Floor Constructions, of which the following is a specification.

My invention relates to concrete floor concause the sections of the bars between the columns to be sufficiently below to properly reinforce the lower part of the slab against positive breaking moment and to keep the sections of the bars at the columns in position in the upper part of the slab to rein force against negative breaking moment. Such preforming of the reinforcing bars requires additional labor and therefore increases the cost of the structure. The use of special head forms also adds to the cost besides unnecessarily weighting the building structure.

One of the important objects of the invention is to build up the metal reinforcement for the slab flooring of stock bars and to allow these bars to sagby their own weight int position between columns thus greatly reducing the cost.

Another object is to dispense with the special head forms by utilizing separate stools or raise blocks of metal or cement at the columns to support the reinforcing bars at the proper height, such stools or blocks being laid on temporary flooring or false work on which concrete is poured to surround the reinforcing bars of the main bands and the intermediate bands. Small size rods, wire mesh or the like, which readily deflect by their own weight between supports are used and thus the weight and cost of the structure is greatly reduced.

On the accompanying sheet of drawings Figure 1 is a perspective plan view of as ection of reinforcing net-work, Fig. 2 shows a modified arrangement for forming the intermediate or crossreinforcing bands, Fig.

Specification of Letters Patent.

Patented May 9, 1916. Serial No. 786,434.

3 is a sectional "iew taken on plane 33,

Fig. 1, Fig. 4: is a sectional view taken on plane H, Fig. 1, and Figs. 5 and 6 show modified arrangements at the heads of the columns. r 7

Referring to the drawings, in Fig. 1, I show four columns a, b, c and d. To support the reinforcing work for receiving the concrete false flooring 10 (Fig. 3) is built about the column head in any suitable preferably having manner, this flooring which the column openings 10 through heads extend. each pillar are outer longitudinal rows 11 and 12 and a central longitudinal row 13, and outer transverse rows 15 and 16 anda central transverse row 17 of raise blocks or stools e. Laid on the outer longitudinal; rows Hand 12 of blocks at the pillarsare the main supporting bars 18. and 19 extending from pillar to pillar and on the blocks of the central longitudinal row 13 are the main supporting bars 20. Laid on these longitudinally extending main supporting bars and over the blocks of the transverse rows 15, 16 and 17 are the transverse bars 21, 22 and 23, any number of intermediate transverse bars 24: being laid 011 the longitudinal bars to extend from pillar to pillar. Laid on top of the transverse bars are any number of intermediate longitudinal bars 25 extending parallelly with the main supporting bars 18, 19 and 20. The longitudinal bars form main reinforcing bands eX- tending from pillar to pillar in one direc tion and the transverse bars form reinforcing bands extending in transverse direction from pillar to pillar and where these bands intersect over the pillars strong reinforcing planes are formed substantially at a level with the tops of the raise members to guard and strengthen against negative breaking moment. All the bars in each longitudinal band are allowed to sag by their own weight in the spaces between adjacent outer transverse rows 15 and 16 of raise members a indicated at 26 in order to form reinforcing fields near the bases of the flooring sections between pillars to strengthen against positive breaking moment. Likewise, the sections 27 of the bar of the transverse bands are allowed to sag by their own Set on this flooring adjacent In addition to the main bands of bars longitudinal and transverse intermediate reinforcing bands of bars 28 and 29 are provided. In order to support the intermedi ate bars 28 the transverse centralbars 23 are not allowed to sag between the pillars but their intermediate sections 23 are propped up by blocks or stools 30, the ends of the bars 28 adjacent the ends of the pillars appearing near the top surface of the concrete slabs to reinforce against negative moment, but the intermediate sections 28 of these bars are allowed to sag. In like manner the intermediate sections 13 of the cen tral longitudinal bars 13 are propped up andprevented from sagging by blocks or stools 31 and these sections 13 support the bars 29 of the transverse intermediate bands the sections of these bars between the pillars being then near the upper surface of the concrete flooring to reinforce against negative moment and the interme- :diate sections 29 thereof beingallowedto sag into substantially the plane of the intermediate sections 28' of the bars 28.

The entire reinforcing net-worlris thus built up ofordinary stock bar and no preforming or bending 1S necessary, the main supporting bars being simply laid on the properly arranged supporting bars and the transverse bars and the intermediate bars are laid on in the order referred to, the unsupported sections of the bars sagging by their own weight into the proper reinforcing planes. After buildingup of the reinforcing network, a cement mixture such as concrete is poured on to the false flooring about the raise members and reinforcing net-work and when the cement material is set and dried the false flooring can be removed and the raise members andreinforcing net-work will be entirely surrounded by the cement to forma strong and rigid floor slab. If the columns are of cement the floor concrete will be intimately united thereto during the pouring operation. The supporting columns are shown terminating in a flaring head h and a flange 7. In Fig. 5 the flange is shown omitted and in Fig. 6 the column is entirely straight. I

Instead of utilizing separate bars for the intermediate reinforcing bands 28 and 32, such bands can be in the form of mesh such Copies of this patent may be obtained for five cents each, by addressing the as bars 33 connected by cross wires 34: as shown in Fig. 2.

I thus produce a very simple yet efficient reinforcing structure and arrangement for the exact construction and arrangement shown and described as changes and modifications are no doubt possible which would still come within the scope of the invention.

1 claim as follows: In concrete floor construction, the combination of supporting columns arranged in longitudinal and transverse rows, longitu-' dinal and transverse rows of raise blocks supported adjacent and above the end of each column, main longitudinal and transverse supporting bars on said longitudinal and transverse rows respectively and extending from column to column alongside the, edge thereof, said longitudinal and transverse bars being held horizontally by said blocks above the columns to form heads for said columns'and being permitted to 'droop or sagby their natural weight between columns, longitudinaland transverse center'main supporting bars supported on said blocks and extending from column to column centrally thereacross, additional. raise blocks between columns for preventing sag of said center main bars between columns, and intermediate bars extending transverse and longitudinally between columns and supported on the sections betweencolumns of the center main supporting bars, said intermediate bars being allowed to droop or sag by their natural weight between the'central main supporting bars.

In witness whereof, I hereunto subscribe my name this 22nd day of August, A. Dr 1913. V I

WILLIAM E. RAMSEY.

vVitnesses:

CHARLES J. SoI-IMIDT, EDMUND G. INonnsoLL.

Commissioner of Patents Washington, D. G. 

